The purpose of this paper is to record two peculiar cases of human myiases occurring in Northern Brasil which apparently have not been reported. In both cases maggots of Alouattamyia baeri (Shannon & Greene) (Diptera, Cuterebridae) were localized in the pharyngeal cavity. The first case involved a female Suruí indian, 30 years old, living in the Parque Aripuanã, Rondônia, presenting symptoms of cough, nausea, dyspnea and painful throat. After treatment with Tiabendazol six large maggots were expelled through the mouth. The second case occurred in the state of Amazonas, involving a 45 years old worker of the Manaus-Manacapuru road, km 27. The patient showed, for two weeks, intense cough and throat irritation and after gargle with iodine solution expelled a large maggot. The native hosts of this fly include mainly howler monkeys (Alouatta sp.). The large maggots (22-27 mm) develop in the cervical, upper sternal and axillary regions. An up-to-date list of hosts of A. baeri found in the literature is presented. The material is deposited in the collection of the Museu de Zoologia, Universidade de São Paulo.